An Inquiry into the Nature and Causes of The Wealth of Nations
Author: Adam Smith
http://www.ibiblio.org/ml/libri/s/SmithA_WealthNations_p.pdf

The General Theory of Employment, Interest, and Money
Author: John Maynard Keynes 13 December 1935
http://cas.umkc.edu/economics/people/facultypages/kregel/courses/econ645
/winter2011/generaltheory.pdf#search='The+General+Theory+of+Employment%
2C+Interest+and+Money'